Space Invaders Bop-It

The Space Invaders Bop-It is an embedded interactive game that combines the reflex-based mechanics of Bop-It with the space-themed gameplay of Space Invaders. Built around the ATMega328P microcontroller, this project incorporates physical controls, audio/visual feedback, and a custom PCB to deliver an engaging and fast-paced user experience.

Overview

Players are prompted with random commands such as:

• Turn Left
• Turn Right
• Throttle Up
• Shoot

Each command corresponds to one of the three physical inputs:

• Steering Wheel
• Throttle Lever
• Push Button

Correct responses increase the player’s score, flash a green LED, and play a "ding" sound. Incorrect or delayed responses trigger a red LED, a crash sound, and reset the game. The objective is to reach a score of 99 without failure.

Features

• Three unique analog/digital inputs: steering, throttle, fire
• LCD screen to display real-time score
• DFPlayer Mini for audio feedback via speakers
• LED indicators for success and failure
• Finite State Machine logic with decreasing response time per successful input
• Enclosure design using Onshape CAD and laser-cut acrylic
• Custom PCB built in KiCad with support for power regulation, audio, and I/O

Repository Structure

├── src/ # Arduino software

├── pcb/ # KiCad PCB design files

├── cad/ # CAD screenshots and Onshape link

├── docs/ # Final report and additional documentation

├── media/ # Photos and video demonstration

├── LICENSE

└── README.md

How to Build

1. Clone this repository: https://github.com/iamratedpg13/SpaceInvaders.git

2. Upload src/main.ino to an ATMega328P or Arduino Uno-compatible board.

3. Assemble the PCB using the files in the pcb/ directory.

4. 3D print or laser cut enclosure parts using the files or images in cad/.

5. Copy required .mp3 sound files to a FAT32-formatted microSD card and insert it into the DFPlayer Mini module.

6. Power the system using a regulated 5V supply (e.g., 9V battery with onboard regulator).

Video Demo

Watch the game in action:
https://www.youtube.com/watch?v=FF51uR-_Np4

Key Implementation Notes

• The throttle and wheel are analog inputs (potentiometers); the button is digital.
• AVCC on the ATMega must be tied to 5V for proper ADC operation.
• Sound and display use UART and I2C, respectively; serial conflicts were resolved manually.
• Input drift was corrected in software by sampling baseline values at startup.

Team Members

• PJ Granieri – Hardware and PCB Design
• Joshua Krymgold – Software Development
• Aragya Goyal – Enclosure Design and CAD

License

This project is licensed under the MIT License. See the LICENSE file for details.